/Engine/Source/Runtime/Engine/Classes/Components/SkeletalMeshComponent.h
Get the bones required for shadow shapes.
static void GetShadowShapeRequiredBones ( const [USkeletalMeshComponent](API\Runtime\Engine\Components\USkeletalMeshComponent) * SkeletalMeshComponent, [TArray](API\Runtime\Core\Containers\TArray)< FBoneIndexType > & OutRequiredBones )